From front to back: Louise Johnson (Betty Louise Jensen), Marge Johnson (Marjorie Jensen) and my grandma Mary Johnson (Mary Jensen). There is no additional information about this photo, but based on the ages of everyone in the photo, I'm guessing it's from about 1940, give or take 2 or 3 years. They lived in Chicago at that time, but it's possible it was also taken in Forest City, Iowa.